var buffer_1 = Buffer.alloc(10);

var buffer_2 = Buffer.allocUnsafe(10)

var buffer_3 = Buffer.from('帮你打飞机');

var tostring = buffer_3.toString()
console.log("buffer_1",buffer_1);

console.log("buffer_2",buffer_2);

console.log("buffer_3",buffer_3);

console.log(tostring);